<html style="font-size: 9.25926vw" class="dark">

<head fit="true">
  <meta charset="utf-8" />
  <meta content="portrait" name="screen-orientation" />
  <meta content="portrait" name="x5-orientation" />
  <meta content="webkit" name="renderer" />
  <meta content="max-age=180" http-equiv="Cache-control" />
  <meta name="viewport"
        content="width=device-width,initial-scale=0.5,maximum-scale=0.5,minimum-scale=0.5,user-scalable=no" />
  <title>att selector</title>
  <meta name="keywords" content="请配置页面关键词" />
  <meta name="description" content="请配置页面描述" />
</head>

<style>
    body {
        width: 100%;
        height: 100vh;
        margin: 0;
    }

    html.dark {
        color: aquamarine;
    }
</style>

<body>
<div>
  <span class="content">content</span>
</div>
</body>
</html>
